/* Challenge Cards Styling */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.challenge-card {
    background: var(--secondary-bg, #1e1e2e);
    border: 1px solid var(--border-color, #333);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.challenge-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 65, 0.1);
    border-color: var(--accent-green, #00ff41);
}

.challenge-card.completed {
    background: rgba(0, 255, 65, 0.1);
    border-color: var(--accent-green, #00ff41);
}

.challenge-card.completed::after {
    content: "✓";
    position: absolute;
    top: 10px;
    right: 10px;
    color: var(--accent-green, #00ff41);
    font-size: 18px;
    font-weight: bold;
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.challenge-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary, #fff);
    margin-bottom: 5px;
}

.challenge-difficulty {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.difficulty-beginner {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
    border: 1px solid #4CAF50;
}

.difficulty-intermediate {
    background: rgba(255, 193, 7, 0.2);
    color: #FFC107;
    border: 1px solid #FFC107;
}

.difficulty-advanced {
    background: rgba(255, 152, 0, 0.2);
    color: #FF9800;
    border: 1px solid #FF9800;
}

.difficulty-expert {
    background: rgba(244, 67, 54, 0.2);
    color: #F44336;
    border: 1px solid #F44336;
}

.challenge-description {
    color: var(--text-secondary, #ccc);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 15px;
}

.challenge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.challenge-category {
    background: var(--tertiary-bg, #2a2a3a);
    color: var(--text-secondary, #ccc);
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 12px;
    border: 1px solid var(--border-color, #333);
}

.challenge-xp {
    color: var(--accent-green, #00ff41);
    font-weight: 600;
    font-size: 14px;
}

/* Challenge Header and Controls */
.challenges-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.challenges-title h2 {
    color: var(--text-primary, #fff);
    margin: 0 0 8px 0;
    font-size: 28px;
    font-weight: 700;
}

.challenges-title p {
    color: var(--text-secondary, #ccc);
    margin: 0;
    font-size: 16px;
}

.challenge-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.challenge-search {
    position: relative;
    min-width: 250px;
}

.challenges-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--secondary-bg, #1e1e2e);
    border-radius: 12px;
    border: 1px solid var(--border-color, #333);
}

.challenge-stat {
    text-align: center;
}

.challenge-stat .stat-number {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-green, #00ff41);
    margin-bottom: 5px;
}

.challenge-stat .stat-label {
    font-size: 12px;
    color: var(--text-secondary, #ccc);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.generate-btn {
    background: linear-gradient(45deg, var(--accent-green, #00ff41), #00cc33);
    border: none;
    color: var(--primary-bg, #0a0a0f);
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 65, 0.3);
}

.load-more-container {
    text-align: center;
    margin-top: 40px;
}

.load-more-btn {
    background: var(--secondary-bg, #1e1e2e);
    border: 2px solid var(--accent-green, #00ff41);
    color: var(--accent-green, #00ff41);
    padding: 12px 30px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.load-more-btn:hover {
    background: var(--accent-green, #00ff41);
    color: var(--primary-bg, #0a0a0f);
    transform: translateY(-2px);
}


/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --tertiary-bg: #2a2a2a;
    --accent-green: #00ff41;
    --accent-blue: #00d4ff;
    --accent-purple: #8b5cf6;
    --accent-gold: #ffd700;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #707070;
    --border-color: #333;
    --error-color: #ff4444;
    --success-color: #00ff41;
    --warning-color: #ffaa00;
    --shadow-glow: 0 0 20px rgba(0, 255, 65, 0.3);
    --shadow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
    --border-radius: 12px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    scroll-behavior: smooth;
}

/* Enhanced Matrix Background Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 255, 65, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    z-index: -2;
    animation: gradient-shift 20s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 255, 65, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 65, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
    z-index: -1;
    animation: matrix-move 20s linear infinite;
}

@keyframes matrix-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(20px, 20px); }
}

/* Error Boundary */
.error-boundary {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(10px);
}

.error-content {
    background: var(--secondary-bg);
    border: 1px solid var(--error-color);
    border-radius: var(--border-radius);
    padding: 40px;
    text-align: center;
    max-width: 500px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.error-content i {
    font-size: 48px;
    color: var(--error-color);
    margin-bottom: 20px;
}

.error-content h2 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.retry-button {
    background: var(--accent-green);
    border: none;
    color: var(--primary-bg);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 20px;
    transition: var(--transition-normal);
}

.retry-button:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
}

/* Enhanced Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity var(--transition-slow);
}

.loading-animation {
    text-align: center;
}

.terminal-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 500;
}

.loading-progress {
    width: 300px;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--tertiary-bg);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 2px;
    transition: width var(--transition-normal);
    animation: progress-shine 2s infinite;
}

.progress-text {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes progress-shine {
    0% { box-shadow: 0 0 10px rgba(0, 255, 65, 0.3); }
    50% { box-shadow: 0 0 20px rgba(0, 255, 65, 0.6); }
    100% { box-shadow: 0 0 10px rgba(0, 255, 65, 0.3); }
}

/* Main App */
.main-app {
    transition: opacity var(--transition-slow);
}

.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Enhanced Navigation Header */
.nav-header {
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
    position: relative;
}

.logo-3d {
    width: 45px;
    height: 45px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    animation: pulse-glow 2s ease-in-out infinite alternate;
    position: relative;
    overflow: hidden;
}

.logo-glow {
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 14px;
    z-index: -1;
    filter: blur(4px);
    opacity: 0.7;
}

@keyframes pulse-glow {
    0% { box-shadow: var(--shadow-glow); }
    100% { box-shadow: 0 0 30px rgba(0, 255, 65, 0.5); }
}

.logo-3d i {
    font-size: 22px;
    color: var(--primary-bg);
    z-index: 1;
}

.platform-title {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.title-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-subtitle {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-normal);
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.nav-btn.active {
    background: rgba(0, 255, 65, 0.1);
    border-color: var(--accent-green);
    color: var(--accent-green);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.2);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.xp-display, .level-display, .streak-display {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    transition: var(--transition-normal);
}

.xp-display:hover, .level-display:hover, .streak-display:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.xp-display i {
    color: var(--accent-green);
}

.streak-display i {
    color: var(--warning-color);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-green);
    border-radius: 8px;
    padding: 15px 20px;
    max-width: 400px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 12px;
}

.toast.error {
    border-left-color: var(--error-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.success {
    border-left-color: var(--success-color);
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Content Sections */
.content-section {
    display: none;
    min-height: calc(100vh - 70px);
    padding: 40px 20px;
    animation: fadeIn 0.5s ease-in-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Enhanced Dashboard Styles */
.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
}

.welcome-banner {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: linear-gradient(135deg, rgba(0, 255, 65, 0.1), rgba(0, 212, 255, 0.1));
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.welcome-banner h2 {
    font-size: 28px;
    margin-bottom: 10px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.animated-card {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.stat-icon i {
    font-size: 24px;
    color: var(--primary-bg);
}

.stat-content {
    flex: 1;
}

.stat-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.stat-content p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.stat-trend {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--success-color);
    font-size: 12px;
}

.stat-trend i {
    font-size: 10px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.progress-section {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
}

.progress-section h2 {
    margin-bottom: 25px;
    color: var(--text-primary);
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-domains {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-domain {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-info h4 {
    color: var(--text-primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.skill-level {
    color: var(--text-secondary);
    font-size: 14px;
}

.progress-bar-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--tertiary-bg);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 4px;
    transition: width var(--transition-slow);
    position: relative;
}

.progress-shine {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progress-shine 2s infinite;
}

.progress-percentage {
    min-width: 40px;
    text-align: right;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}

.recent-activity {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
}

.recent-activity h2 {
    margin-bottom: 25px;
    color: var(--text-primary);
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: var(--tertiary-bg);
    border-radius: 8px;
    border-left: 3px solid var(--accent-green);
    transition: var(--transition-normal);
}

.activity-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

.activity-item i {
    color: var(--accent-green);
    font-size: 16px;
    margin-top: 2px;
}

.activity-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.activity-text {
    color: var(--text-primary);
    font-size: 14px;
}

.activity-time {
    color: var(--text-muted);
    font-size: 12px;
}

.quick-actions {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
}

.quick-actions h2 {
    margin-bottom: 25px;
    color: var(--text-primary);
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.action-btn {
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 15px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
}

.action-btn:hover {
    background: var(--accent-green);
    color: var(--primary-bg);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 65, 0.3);
}

/* Enhanced Terminal Styles */
.terminal-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 20px;
    height: calc(100vh - 150px);
}

.terminal-main {
    display: flex;
    flex-direction: column;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.terminal-header {
    background: var(--tertiary-bg);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.terminal-controls {
    display: flex;
    gap: 8px;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.control-dot:hover {
    transform: scale(1.2);
}

.control-dot.red { background: #ff5f56; }
.control-dot.yellow { background: #ffbd2e; }
.control-dot.green { background: #27ca3f; }

.terminal-title {
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    color: var(--text-secondary);
}

.terminal-actions {
    display: flex;
    gap: 8px;
}

.terminal-action {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.terminal-action:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: scale(1.1);
}

.terminal-body {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    border-top: none;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.terminal-output {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
}

.terminal-output::-webkit-scrollbar {
    width: 8px;
}

.terminal-output::-webkit-scrollbar-track {
    background: var(--tertiary-bg);
}

.terminal-output::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.terminal-output::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green);
}

.welcome-message {
    margin-bottom: 20px;
}

.ascii-art {
    color: var(--accent-green);
    font-size: 8px;
    line-height: 1;
    margin-bottom: 20px;
    overflow-x: auto;
    white-space: pre;
    animation: typewriter 2s steps(40);
}

@keyframes typewriter {
    from { width: 0; }
    to { width: 100%; }
}

.highlight {
    color: var(--accent-green);
    font-weight: 600;
    background: rgba(0, 255, 65, 0.1);
    padding: 2px 4px;
    border-radius: 3px;
}

.terminal-input-line {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    background: var(--secondary-bg);
}

.prompt {
    color: var(--accent-green);
    font-family: 'Fira Code', monospace;
    font-weight: 600;
    margin-right: 8px;
    white-space: nowrap;
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    font-size: 14px;
    outline: none;
    caret-color: var(--accent-green);
}

.terminal-input::placeholder {
    color: var(--text-muted);
}

.terminal-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.command-hints, .command-history, .performance-tracker {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.command-hints h3, .command-history h3, .performance-tracker h3 {
    background: var(--tertiary-bg);
    padding: 15px 20px;
    margin: 0;
    font-size: 16px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.hint-content, .history-content {
    padding: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    max-height: 200px;
    overflow-y: auto;
    line-height: 1.5;
}

.history-item {
    margin-bottom: 8px;
    font-family: 'Fira Code', monospace;
    color: var(--text-muted);
    padding: 5px 8px;
    border-radius: 4px;
    transition: var(--transition-fast);
    cursor: pointer;
}

.history-item:hover {
    background: var(--tertiary-bg);
    color: var(--text-primary);
}

.performance-stats {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.perf-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.perf-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.perf-value {
    color: var(--accent-green);
    font-weight: 600;
    font-size: 14px;
}

/* Enhanced Challenges Styles */
.challenges-container {
    max-width: 1400px;
    margin: 0 auto;
}

.challenges-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;    margin-bottom: 30px;
    gap: 20px;
}

.challenges-title h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.challenges-title p {
    color: var(--text-secondary);
    font-size: 16px;
}

.challenge-controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: flex-end;
}

.challenge-search {
    position: relative;
    width: 300px;
}

.search-input {
    width: 100%;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px 12px 40px;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: var(--transition-normal);
}

.search-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.2);
}

.challenge-search i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.challenge-filters {
    display: flex;
    gap: 10px;
}

.filter-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.filter-btn:hover {
    background: var(--tertiary-bg);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: var(--primary-bg);
    box-shadow: 0 0 15px rgba(0, 255, 65, 0.3);
}

.generate-btn {
    background: linear-gradient(45deg, var(--accent-purple), var(--accent-blue));
    border: none;
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 8px;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(139, 92, 246, 0.4);
}

.challenges-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.challenge-stat {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: var(--transition-normal);
}

.challenge-stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.stat-number {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-green);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.challenge-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 25px;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.challenge-card:hover::before {
    transform: scaleX(1);
}

.challenge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.challenge-card.completed {
    border-color: var(--success-color);
    background: rgba(0, 255, 65, 0.05);
}

.challenge-card.completed::before {
    background: var(--success-color);
    transform: scaleX(1);
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.challenge-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.challenge-difficulty {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    white-space: nowrap;
}

.difficulty-beginner {
    background: rgba(0, 255, 65, 0.1);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.difficulty-intermediate {
    background: rgba(255, 170, 0, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.difficulty-advanced {
    background: rgba(255, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.difficulty-expert {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-purple);
    border: 1px solid var(--accent-purple);
}

.challenge-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.challenge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.challenge-category {
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
}

.challenge-xp {
    color: var(--accent-green);
    font-weight: 600;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.load-more-container {
    text-align: center;
}

.load-more-btn {
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 15px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.load-more-btn:hover {
    background: var(--accent-green);
    color: var(--primary-bg);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 65, 0.3);
}

/* Enhanced Achievements Styles */
.achievements-container {
    max-width: 1400px;
    margin: 0 auto;
}

.achievements-header {
    text-align: center;
    margin-bottom: 40px;
}

.achievements-header h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.achievements-header p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 20px;
}

.achievement-stats {
    color: var(--accent-green);
    font-size: 18px;
    font-weight: 600;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.achievement-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 25px;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.achievement-card.unlocked {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.2);
    animation: achievementUnlock 0.8s ease-out;
}

@keyframes achievementUnlock {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

.achievement-card.unlocked::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    transition: all var(--transition-normal);
    position: relative;
}

.achievement-card.unlocked .achievement-icon {
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    color: var(--primary-bg);
    box-shadow: var(--shadow-glow);
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.achievement-card:not(.unlocked) .achievement-icon {
    background: var(--tertiary-bg);
    color: var(--text-muted);
}

.achievement-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.achievement-card.unlocked .achievement-name {
    color: var(--text-primary);
}

.achievement-card:not(.unlocked) .achievement-name {
    color: var(--text-muted);
}

.achievement-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Enhanced Leaderboard Styles */
.leaderboard-container {
    max-width: 1000px;
    margin: 0 auto;
}

.leaderboard-header {
    text-align: center;
    margin-bottom: 30px;
}

.leaderboard-header h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.leaderboard-header p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 20px;
}

.leaderboard-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.period-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition-normal);
}

.period-btn:hover {
    background: var(--tertiary-bg);
    color: var(--text-primary);
}

.period-btn.active {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: var(--primary-bg);
}

.leaderboard-table {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.leaderboard-header-row {
    background: var(--tertiary-bg);
    padding: 20px;
    display: grid;
    grid-template-columns: 80px 1fr 100px 100px 100px 120px;
    gap: 20px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.leaderboard-list {
    max-height: 600px;
    overflow-y: auto;
}

.leaderboard-entry {
    padding: 20px;
    display: grid;
    grid-template-columns: 80px 1fr 100px 100px 100px 120px;
    gap: 20px;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.leaderboard-entry:hover {
    background: rgba(255, 255, 255, 0.02);
}

.leaderboard-entry:last-child {
    border-bottom: none;
}

.leaderboard-entry.current-user {
    background: rgba(0, 255, 65, 0.1);
    border-left: 3px solid var(--accent-green);
}

.entry-rank {
    font-weight: 700;
    font-size: 18px;
    text-align: center;
}

.entry-rank.top-3 {
    color: var(--accent-gold);
}

.entry-user {
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.entry-level, .entry-xp, .entry-streak, .entry-challenges {
    text-align: center;
    color: var(--text-secondary);
}

/* Analytics Styles */
.analytics-container {
    max-width: 1400px;
    margin: 0 auto;
}

.analytics-header {
    text-align: center;
    margin-bottom: 40px;
}

.analytics-header h2 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.analytics-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
    transition: var(--transition-normal);
}

.analytics-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.analytics-card h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chart-container {
    height: 200px;
    background: var(--tertiary-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-placeholder {
    color: var(--text-muted);
    font-style: italic;
}

.command-frequency {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.command-freq-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.command {
    font-family: 'Fira Code', monospace;
    color: var(--accent-green);
    min-width: 60px;
    font-weight: 600;
}

.freq-bar {
    flex: 1;
    height: 8px;
    background: var(--tertiary-bg);
    border-radius: 4px;
    overflow: hidden;
}

.freq-fill {
    height: 100%;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue));
    border-radius: 4px;
    transition: width var(--transition-slow);
}

.freq-count {
    color: var(--text-secondary);
    font-weight: 600;
    min-width: 30px;
    text-align: right;
}

/* Enhanced AI Assistant Styles */
.ai-assistant {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 400px;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 200;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.ai-assistant.collapsed .assistant-body {
    display: none;
}

.ai-assistant.minimized {
    transform: translateY(calc(100% - 60px));
}

.assistant-header {
    background: var(--tertiary-bg);
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
}

.assistant-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.assistant-info i {
    color: var(--accent-blue);
    font-size: 18px;
}

.assistant-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.assistant-controls {
    display: flex;
    gap: 5px;
}

.assistant-control, .toggle-assistant {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 5px;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.assistant-control:hover, .toggle-assistant:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.assistant-body {
    height: 400px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.assistant-message, .user-message {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    animation: messageSlide 0.3s ease-out;
}

@keyframes messageSlide {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.user-message {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.assistant-message .message-avatar {
    background: var(--accent-blue);
    color: var(--primary-bg);
}

.user-message .message-avatar {
    background: var(--accent-green);
    color: var(--primary-bg);
}

.message-content {
    background: var(--tertiary-bg);
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 80%;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
}

.user-message .message-content {
    background: var(--accent-green);
    color: var(--primary-bg);
}

.quick-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.suggestion-btn {
    background: var(--primary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.suggestion-btn:hover {
    background: var(--accent-green);
    color: var(--primary-bg);
    border-color: var(--accent-green);
}

.chat-input-container {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

.chat-input {
    flex: 1;
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-normal);
}

.chat-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
}

.send-button {
    background: var(--accent-blue);
    border: none;
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--primary-bg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.send-button:hover {
    background: var(--accent-green);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

/* Enhanced Challenge Modal */
.challenge-modal, .settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalSlide 0.3s ease-out;
}

@keyframes modalSlide {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-header {
    background: var(--tertiary-bg);
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.challenge-timer {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--warning-color);
    font-weight: 600;
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
    transition: all var(--transition-normal);
}

.close-modal:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    padding: 20px;
    flex: 1;
    overflow-y: auto;
}

.challenge-description {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.challenge-terminal {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
}

.challenge-terminal .terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
}

.challenge-progress {
    color: var(--text-muted);
    font-size: 14px;
}

.challenge-terminal .terminal-body {
    height: 300px;
}

.challenge-hints {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.hint-button {
    background: var(--accent-purple);
    border: none;
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 8px;
    align-self: flex-start;
}

.hint-button:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

.hint-display {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--accent-purple);
    border-radius: 8px;
    padding: 15px;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
}

/* Settings Modal */
.settings-section {
    margin-bottom: 30px;
}

.settings-section h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: 600;
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
    padding: 10px 0;
}

.setting-item label {
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-item input[type="checkbox"] {
    accent-color: var(--accent-green);
}

.setting-item select, .setting-item input[type="range"] {
    background: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
}

/* Terminal Command Styling */
.command-output {
    margin: 10px 0;
}

.command-line {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}

.command-prompt {
    color: var(--accent-green);
    margin-right: 8px;
}

.command-text {
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
}

.command-result {
    color: var(--text-secondary);
    margin-left: 20px;
    white-space: pre-wrap;
}

.command-error {
    color: var(--error-color);
    margin-left: 20px;
}

.command-success {
    color: var(--success-color);
    margin-left: 20px;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    z-index: 10000;
    animation: slideIn 0.3s ease-out;
    max-width: 300px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.notification.success {
    background: linear-gradient(135deg, #00ff41, #00cc33);
}

.notification.error {
    background: linear-gradient(135deg, #ff4444, #cc0000);
}

.notification.info {
    background: linear-gradient(135deg, #4444ff, #0000cc);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Activity Item Fixes */
.activity-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.activity-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Progress Bar Enhancements */
.progress-percentage {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-left: 8px;
}

/* Challenge Card Improvements */
.challenge-card.completed {
    border-color: var(--accent-green);
    background: rgba(0, 255, 65, 0.05);
}

.challenge-card.completed::before {
    content: '✓';
    position: absolute;
    top: 10px;
    right: 10px;
    color: var(--accent-green);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .challenges-grid {
        grid-template-columns: 1fr;
    }

    .achievements-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .analytics-grid {
        grid-template-columns: 1fr;
    }

    .leaderboard-header-row,
    .leaderboard-entry {
        grid-template-columns: 60px 1fr 80px 80px 80px;
        gap: 10px;
        font-size: 14px;
    }

    .entry-challenges {
        display: none;
    }

    .ai-assistant {
        width: calc(100vw - 40px);
        right: 20px;
        left: 20px;
    }

    .nav-btn .nav-text {
        display: none;
    }

    .nav-btn {
        flex: 1;
        justify-content: center;
        padding: 12px 8px;
    }

    .user-info {
        gap: 10px;
    }

    .xp-display, .level-display, .streak-display {
        padding: 6px 8px;
        font-size: 12px;
    }

    .title-subtitle {
        display: none;
    }
}

@media (max-width: 480px) {
    .content-section {
        padding: 20px 10px;
    }

    .terminal-output,
    .terminal-input-line {
        padding: 15px;
    }

    .ascii-art {
        font-size: 6px;
    }

    .title-text {
        font-size: 18px;
    }

    .nav-btn {
        padding: 10px 6px;
        font-size: 12px;
    }

    .modal-content {
        margin: 10px;
        max-width: calc(100vw - 20px);
    }

    .challenge-filters {
        flex-wrap: wrap;
    }

    .filter-btn {
        flex: 1;
        min-width: 80px;
        padding: 8px 12px;
        font-size: 12px;
    }
}

/* Print Styles */
@media print {
    .nav-header, .ai-assistant, .toast-container {
        display: none;
    }

    .content-section {
        display: block !important;
        padding: 0;
    }

    body {
        background: white;
        color: black;
    }

    .terminal-output {
        background: white;
        color: black;
        border: 1px solid #ccc;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-bg: #000000;
        --secondary-bg: #111111;
        --tertiary-bg: #222222;
        --text-primary: #ffffff;
        --text-secondary: #cccccc;
        --border-color: #555555;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Visible */
:focus-visible {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

/* Selection Styling */
::selection {
    background: rgba(0, 255, 65, 0.3);
    color: var(--text-primary);
}

/* Custom Scrollbar for Webkit browsers */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--tertiary-bg);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green);
}

::-webkit-scrollbar-corner {
    background: var(--tertiary-bg);
}